We will hold The 7th Morbidity & Mortality Conference at Department of Neurosurgery, Toyama University Hospital on January 17, 2017. We are discussing the causes and improvement plans in this conference altogether every 6 months. As the results, the incidence of “avoidable” medical accidents is gradually decreasing for these 4 years, which will be published soon. This conference is open to the all of medical staffs and medical students.